The business analyst for Ace Business Machines, Inc. wants to forecast this year's demand for manual typewriters based on the following historical data:

TIME PERIOD DEMAND

$5$ ?years ago $900$

$4$ ?years ago $700$

$3$ ?years ago $600$

$2$ ?years ago $500$

Last year $300$

What is the forecast for this year using the naive approach?

Question $8$ ?options:

$420$

$180$

$510$

$163$

$100$